From: x@xz.nl (Claudius Proculus)
Subject: Re: Ada or C++ acting 'correctly' here?
Date: 1999/02/27
Date: 1999-02-27T00:00:00+00:00 [thread overview]
Message-ID: <7b9i8l$6ql$1@ash.prod.itd.earthlink.net> (raw)
In-Reply-To: 7b8c7u$sj1@drn.newsguy.com
In article <7b8c7u$sj1@drn.newsguy.com>, bill@mooner wrote:
>Hello,
>
>compare these 2 little programs, do same thing, one in C++
>and one in Ada. The C++ program compiles Ok, but result is
>negative, the Ada program refused to compile:
>
>
>----------------------------
>#include <iostream>
>int main()
>{
> cout<<(500000000*7);
> return 0;
>}
>-----------------------------
>%g++ -Wall test_mult.cc
>%./a.out
>-794967296
>
>(this is g++ 2.8.1)
>
>----------------------------
>with Ada.Integer_Text_Io; use Ada.Integer_Text_Io;
>procedure Test_Multi is
> begin
> Put( 500000000*7 );
> end Test_Multi;
>-----------------------------
>$gnatmake test_multi.adb
>gcc -c test_multi.adb
>test_multi.adb:6:18: value not in range of type "Standard.Integer"
>test_multi.adb:6:18: static expression raises "Constraint_Error"
>gnatmake: "test_multi.adb" compilation error
>
>
>Now. Which would you consider the correct language behaviour?
>(same machine, Pentium pro, Linux.
They are both the correct behavior.
However, this does illustrate one of the benefits of using Ada.
John - N8086N
Wise man says "Never use a bank with the initials F. U."
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next prev parent reply other threads:[~1999-02-27 0:00 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-02-27 0:00 Ada or C++ acting 'correctly' here? bill
1999-02-27 0:00 ` Steve Doiel
1999-02-27 0:00 ` Florian Weimer
[not found] ` <36e8e201.48455851@netnews.worldnet.att.net>
1999-03-18 0:00 ` bglbv
1999-02-27 0:00 ` Claudius Proculus [this message]
1999-02-27 0:00 ` Biju Thomas
1999-02-28 0:00 ` robert_dewar
1999-02-28 0:00 ` Florian Weimer
1999-03-01 0:00 ` dewar
1999-02-27 0:00 ` Gautier.DeMontmollin
1999-02-27 0:00 ` Matthew Heaney
1999-02-28 0:00 ` William McKenzie
1999-03-01 0:00 ` Hubert B. Keller
1999-03-01 0:00 ` fraser
1999-02-28 0:00 ` robert_dewar
1999-03-02 0:00 ` Willliam V
1999-03-02 0:00 ` robert_dewar
1999-03-02 0:00 ` SpamSpamSpam
1999-03-02 0:00 ` Pascal Obry
1999-03-02 0:00 ` Gautier.DeMontmollin
1999-03-02 0:00 ` kvisko
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